Dental syringe nozzle



Aug. 24, 1926. 1,597,604

W. J.' LAUER DENTAL SYHINGE NOZZLE Filed Jan. 17, 1925 Patented Aug. 24,1926. j 1,597,664

UNITED STATES PATENT OFFICE.

WILLIAM J'..LAUER, OIE' ARGYLE, MINNESOTA.

DENTAL SYRINGE N OZZLE.

Application led. January 17, 1925. Serial No. 3,154.

The present invention relates to a dental sheath 6 of refractory material such as fibre appliance for delivering warm air to the is fitted upon the tube l and is spaced therecavity of a tooth forevaporating moisture from as indicated at 7 and this protector or and one of the objects of the invention is to sheath extends substantially the entire length prevent the overheating of the nozzle and the of the tube l and is contracted at opposite 45 burning of the lips when the nozzle is introends to obtain a close lit and result in the duced into the mouth before delivering a provision of an enclosed space 7 which operblast of warm air into the cavity of the tooth ates as a non-conductor to prevent the heatunder treatment. ing of the sheath or protector 6. For sym- 10 Other objects and advantages will be metry of appearance the sheath or protector 50 apparent and suggest themselves as the 6 tapers throughout its length, the smaller nature of the invention is understood. end being adjacent the tip of the nozzle and `Wliile the drawings illustrate an embodithe larger end adjacent the coupling 3 and ment of the invention it is to be understood receiving the inner end thereof.

.that in adapting the same to meet vdifferent lfihat is claimed is 55 conditions and requirements7 various changes l. A dental syringe nozzle comprising a in the form, proportion and minor details of tube having a laterally oEset tip end, a construction may be resorted to without sheath surrounding the tube adapted to abut departing from the nature of the invention. said end, the bore of said sheath being Referring to the accompanying drawings enlarged with respect to the tube to provide 60 forming a part of the specication, a non-conducting space, and a detachable Figure l is a side view of a dental syringe coupling engaging said tube centering and nozzle embodying the invention, the dotted securing the sheathV in place, said coupling lines showing a portion of the usual bulb, being adapted for connection to a bulb.

and 2. A dental syringe nozzle comprising a`65 Figure 2 is a central longitudinal sectional tube having an oi'lset tip end,l a sheath sur-- view of the nozzle. rounding said tube having one end in inti- Corresponding and like parts are referred mate engagement with the tube and in conto in the following description and desigtact with the olilset end, said sheath having nated in both views of the drawings by like its bore enlarged with respect to the tube to reference characters. provide a non-conducting space,v a coupling The nozzle of a dental syringe constructed for connection to a bulb or the like, said in accordance with the present invention coupling being detachably threaded on one comprises a metal tube l which is curved end of the tube, and said coupling extending laterally at one end as indicated at 2 and to partly into the sheath to center it and having the opposite end of which is iitted a coupling a portion abutting the adjacent end thereof 3 of usual formation for attachment of the to secure the same in place. nozzle to a soft rubber bulb 4:. A tip 5 of In testimony whereof I affix my signature. approximately ball shape is fitted to the curved end of the tube 1. A protector or Y WILLIAM J LAUER. 

